Super cool idea! I really like that the dice serve a dual-purpose, in the sense that the can be used for powers or doors - It really makes you think about how you use them. The art is pleasing, as well as the music.
I think it would be super cool to see an expanded version with different powers to equip, or something like that. I also think that the amount of charges you get back should be proportional to the value of the die. It would make high value die that much more impactful, and really force you to think about how you spend them. Taking that idea further, it could be interesting to have each power have it's own cost per charge. So perhaps more powerful abilities are more expensive to recharge, whereas you might have weaker, more spammable abilities that you can load up with charges in-between rooms.
All that being said, I think you did a wonderful job. You have an interesting take on the theme, and a fun game. You should be v proud of what you made :-)